Improvement in steam-pumps



w. ATKINSON.

Patented July 21,1874.

UNITED STATES PATENT OFFICE.

WILLIAM ATKINSON, OF GARDNER, ILLINOIS, ASSIGNOR. TO HIMSELF AND THOMASMAYDEW, OF SAME PLAGE.

IMPROVEMENT IN STEAM-PUMPS.

Specilicaton forming part of Letters Patent No. 153,296, dated July21,1874; application filed April 7, 1874.

To all whom 4it may concer-n: this same water passes through valve e',and Be it known that I, WILLIAM ATKINSON, is on the next movementexpelled through of Gardner, in the county of Grundy and outlet d'. Thisproduces a continuous ilow of State of Illinois, have invented a new andwater at the exit-an eect which has been Improved Steam-Pump; and I dohereby deproduced heretofore,but,I believe, byditferent clare that thefollowing is a full, clear, and means and a di'erent mode of operation.exact description of the same, reference being As the pistons G G areperforated at g g, had to the accompanying drawing, in whichand receivethe same pressure of steam on Figure l is a longitudinal view invertical each side, it is necessary to destroy this equisection; Fig.2,a horizontal section; and Fig. librium in order to make the pistonsmove. 3, a detail view in section of the end of steam- This I do bysliding forward the two valves chest. K alternately, and thus lettingthe steam es- The invention relates to means whereby cape through achannel, J', to a space behind greater simplicity, less liability tostoppage, the valve, and thence to the exhaust through and greatereconomyin the operation of pumps channel J. may be secured. These meanswill first be As upon the degree of freedom with which fully describedin connection with all that is the steam is exhausted from behind thevalve necessary to a full understanding thereof, and K depends theresistance to valve-pistons G, then pointed out in the claims. and theconsequent velocity and power ex- Arepresents the main cylinder of apump, erted by the piston B, I use the transverse having inlet-ports aa, exhaust a', and piston screw or valve O, that works across the chan-B. C is the piston-rod, which is extended nel-way J, and may be'made tograduate the through the cylinder at each end, and into the size oftheoutlet for the steam. This enaoppcsitely-placed auxiliary cylinders D D.bles me to use alarge piston, and yet regu- These have, respectively,water-inlet d, outlet late the degree of power exerted, while it alsod', and pistons E E', the latter being reciproallows me, when usingwater that is muddy,

cated at the same time and by the same or from other causes inclined tofoam, to depower as the main one, B. F is the steamstroy this tendencyby enlarging the exhaustchest, in which is placed the valve-operatingoutlet. pistons G G, having the steam-inlets g g, and It will beobserved that the valves K and connected by the stem H, having themedian 5the valvepistonsG, with theirseveral seats, disk or flange h. Iis the main valve, recessed are all arranged inthesteam-chest,fandmainto receive the flange h, by which it is movedtained in place by a single cap, l?, which may back and forth by themovement of pistons G be held only by two set-screws. The -`caps P G. JJ are channels leading from the steamhave a recess or chamber, p, behindthe kpisspace behind pistons G to the exhaust. K K ton K, whichcommunicates with steam chanare valves, having shanks k, operated by anel-ways J J This is very important, as lever, L, that is pivoted at l,and actuated by these parts require frequent examination and a slidingbolt, M. The latter are alternately adjustment to cause them to fitclosely and moved by the piston B in its reciprocations. operate in themost effective manner. By ar The operation of the pump is as follows:ranging them all together in the ends of the As the piston E movesforward and creates a chest F, complete access to them is obtainedvacuum behind it, the water ilows in through in a moment; while even inthe Cameron inlet d, follows the piston, and, as soon as the pump, whichis the nearest approximation to latter begins to return, courses throughthe mine, and esteemed the most convenient of valve e. It now followsthe channel N and access, it requires a longer time to takeout thepiston E', which in its turn is moving for and return these parts thanto reit them. ward and creating a vacuum in its rear. As What I claim asnew, and desire to secure soon as the piston E begins to move back, byLetters Patent, iS-

1. The combination, with main cylinder A, having steam-ports a a', and.the rod C, having thereon a middle piston, B, and two end pistons, E e Ee', of the two cylinders D D', placed at opposite ends of main cylinder,having', respective1yWater-inlet d and. outlet d', d connected by achanne1-way,N, as and r the purpose specified. 2. The con1bination,withpiston G, of valves K and valve-seat 'caps P, the latter m'rangcd in theends of chest, and having chamber p and channels J J', arranged as andfor the purpose specified.

WM. ATKINSON.

Witnesses:

SoLoN` C. KnMoN, i W. W. HOLLINGSWORTH.

